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PostgreSQL
Database
PostgreSQL
Curated PostgreSQL interview questions with detailed answers.
30
questions
updated weekly
Junior
10
Middle
12
Senior
8
PostgreSQL questions
30 / 30 shown
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Newest
›
What is PostgreSQL and why choose it?
Junior
#Database
Details →
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What data types does PostgreSQL offer beyond standard SQL?
Junior
#Database
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What is psql and what are its essential commands?
Junior
#Database
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How do auto-incrementing IDs work (SERIAL, sequences, IDENTITY)?
Junior
#Database
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›
What are schemas in PostgreSQL?
Junior
#Database
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›
How do roles and privileges work in PostgreSQL?
Junior
#Security
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›
How do array columns work in PostgreSQL?
Junior
#Database
Details →
›
What is UPSERT (INSERT ON CONFLICT)?
Junior
#Query
Details →
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What does the RETURNING clause do?
Junior
#Query
Details →
›
What are generated columns?
Junior
#Database
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›
How does JSONB work and when should you use it?
Middle
#Database
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›
What index types does PostgreSQL offer?
Middle
#Performance
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›
How does full-text search work in PostgreSQL?
Middle
#Database
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›
How do you use EXPLAIN and EXPLAIN ANALYZE?
Middle
#Performance
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›
What is MVCC in PostgreSQL?
Middle
#Database
Details →
›
What are PostgreSQL extensions?
Middle
#Database
Details →
›
How do materialized views work in PostgreSQL?
Middle
#Performance
Details →
›
How does table partitioning work in PostgreSQL?
Middle
#Performance
Details →
›
How do CTEs and recursive queries work in PostgreSQL?
Middle
#Query
Details →
›
What are LISTEN and NOTIFY?
Middle
#Database
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›
What constraints does PostgreSQL support?
Middle
#Database
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›
How do you bulk-load data efficiently with COPY?
Middle
#Performance
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›
What is VACUUM and why is it important?
Senior
#Performance
Details →
›
How does replication work in PostgreSQL?
Senior
#Architecture
Details →
›
What is logical replication and when is it useful?
Senior
#Architecture
Details →
›
Why do you need connection pooling (PgBouncer)?
Senior
#Performance
Details →
›
How do you tune PostgreSQL performance?
Senior
#Performance
Details →
›
How do you back up and recover PostgreSQL?
Senior
#Architecture
Details →
›
How do you achieve high availability in PostgreSQL?
Senior
#Architecture
Details →
›
How does locking work in PostgreSQL?
Senior
#Database
Details →
